Human rights organisations have cast doubt on claims of mass rape and other abuses perpetrated by forces loyal to Colonel Muammar Gaddafi, which have been widely used to justify Nato’s war in Libya.

Nato leaders, opposition groups and the media have produced a stream of stories since the start of the insurrection on 15 February, claiming the Gaddafi regime has ordered mass rapes, used foreign mercenaries and employed helicopters against civilian protesters.

An investigation by Amnesty International has failed to find evidence for these human rights violations and in many cases has discredited or cast doubt on them. It also found indications that on several occasions the rebels in Benghazi appeared to have knowingly made false claims or manufactured evidence.

The findings by the investigators appear to be at odds with the views of the prosecutor of the International Criminal Court, Luis Moreno-Ocampo, who two weeks ago told a press conference that “we have information that there was a policy to rape in Libya those who were against the government. Apparently he [Colonel Gaddafi] used it to punish people.”